## Reading layer `landkreise-in-germany' from data source `C:\Users\nauss_lokal\Documents\plygrnd\CovidAirPolution\data\DE\landkreise-in-germany\landkreise-in-germany.shp' using driver `ESRI Shapefile'
## Simple feature collection with 403 features and 14 fields
## geometry type: MULTIPOLYGON
## dimension: XY
## bbox: xmin: 5.866251 ymin: 47.27012 xmax: 15.04182 ymax: 55.05653
## CRS: 4326
## [1] "LK Böblingen" "LK Breisgau-Hochschwarzwald"
## [3] "LK Erzgebirgskreis" "LK Esslingen"
## [5] "LK Ludwigsburg" "LK Mansfeld-Südharz"
## [7] "LK Nordfriesland" "LK Oberhavel"
## [9] "LK Schwarzwald-Baar-Kreis" "LK Uelzen"
## [11] "SK Freiburg i.Breisgau" "SK Heidelberg"
## [13] "SK Heilbronn" "SK Pforzheim"
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## Precomputing distance matrix...
##
## Iteration 1: Changes / Distsum = 198 / 21618
## Iteration 2: Changes / Distsum = 25 / 14947
## Iteration 3: Changes / Distsum = 9 / 14620
## Iteration 4: Changes / Distsum = 8 / 13278
## Iteration 5: Changes / Distsum = 9 / 11590
## Iteration 6: Changes / Distsum = 2 / 11561
## Iteration 7: Changes / Distsum = 0 / 11561
##
## Elapsed time is 0.16 seconds.
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##
## Precomputing distance matrix...
##
## Iteration 1: Changes / Distsum = 198 / 37653.5
## Iteration 2: Changes / Distsum = 62 / 31797.16
## Iteration 3: Changes / Distsum = 11 / 31428.25
## Iteration 4: Changes / Distsum = 9 / 31285.6
## Iteration 5: Changes / Distsum = 0 / 31285.6
##
## Elapsed time is 0.15 seconds.
Results for PM
## [1] "Start date for analysis: 2020-02-15"
## [1] "End date for analysis: 2020-04-01"
## [1] "PM values: PM10"